Results 31 to 40 of about 111,392 (348)

OGLE-2016-BLG-0693LB: Probing the Brown Dwarf Desert with Microlensing

, 2017
We present an analysis of microlensing event OGLE-2016-BLG-0693, based on the survey-only microlensing observations by the OGLE and KMTNet groups. In order to analyze the light curve, we consider the effects of parallax, orbital motion, and baseline ...
Albrow, M. D., Cha, S. -M., Chung, S. -J., Gould, A., Han, C., Hwang, K. -H., Jung, Y. K., Kim, D. -J., Kim, H. -W., Kim, S. -L., Kozlowski, S., Lee, C. -U., Lee, Y., Mroz, P., Park, B. -G., Pawlak, M., Pietrukowicz, P., Pogge, R. W., Poleski, R., Ryu, Y. -H., Shin, I. -G., Skowron, J., Soszynski, I., Szymanski, M. K., Udalski, A., Ulaczyk, K., Yee, J. C., Zhu, W.   +27 more
core   +1 more source

A Small Brown Dwarf in an Aligned Orbit Around a Young, Fully Convective M Star

The Astronomical Journal
A star's spin–orbit angle can give us insight into a system's formation and dynamical history. In this paper, we use MAROON-X observations of the Rossiter–McLaughlin effect to measure the projected obliquity of the LP 261-75 (also known as TOI-1779 ...
Madison Brady, Jacob L. Bean, Gumundur Stefánsson, Nina Brown, Andreas Seifahrt, Ritvik Basant, Tanya Das, Rafael Luque, Julian Stürmer   +8 more
doaj   +1 more source

Subicular Astrocytes Govern Seizure‐Impaired Fear Memory

Advanced Science, EarlyView.
Astrocytes in dorsal subiculum act as a critical modulator of seizure‐associated cognitive dysfunction, operating through a Ca2+‐dependent adenosine‐linked astrocyte‐neuron signaling pathway that disrupts neuronal circuit homeostasis. This research highlights the potential of astrocyte‐targeted interventions as a therapeutic strategy, moving beyond the
Yuying Shao, Jing Xi, Yuhao Sun, Yulan Li, Zhisheng Li, Wangjialu Lu, Jialu Chen, Lin Yang, Fan Fei, Heming Cheng, Li Cheng, Cenglin Xu, Zhuo Huang, Vladimir Parpura, Yi Wang, Zhong Chen   +15 more
wiley   +1 more source

Spitzer Photometry of WISE-Selected Brown Dwarf and Hyper-Luminous Infrared Galaxy Candidates [PDF]

, 2012
We present Spitzer 3.6 and 4.5 $\mu$m photometry and positions for a sample of 1510 brown dwarf candidates identified by the WISE all-sky survey. Of these, 166 have been spectroscopically classified as objects with spectral types M(1), L(7), T(146), and ...
A. Mainzer, Andrew Blain, Ashby, Bridge, Burgasser, Burgasser, Burgasser, Carol Lonsdale, Carrie R. Bridge, Chao-Wei Tsai, Christopher R. Gelino, Cushing, Cutri, Daniel Stern, Deborah Padgett, Dominic Benford, Edward L. Wright, Eisenhardt, Eisenhardt, Eisenhardt, Emilio Donoso, Epchtein, Faherty, Fazio, Gelino, Gregory Mace, J. Davy Kirkpatrick, Jingwen Wu, Ken Marsh, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Lin Yan, Mainzer, Martin Cohen, Metchev, Michael C. Cushing, Michael E. Ressler, Michael F. Skrutskie, Morgan, Peter R. M. Eisenhardt, Roc M. Cutri, Roger L. Griffith, Sara Petty, Skrutskie, Spencer A. Stanford, Stern, Thomas H. Jarrett, Wright, Wright, Wu, York   +53 more
core   +5 more sources

Phase-resolved Hubble Space Telescope WFC3 Spectroscopy of the Weakly Irradiated Brown Dwarf GD 1400 and Energy Redistribution–Irradiation Trends in Six White Dwarf–Brown Dwarf Binaries

The Astrophysical Journal
Irradiated brown dwarfs offer a unique opportunity to bridge the gap between stellar and planetary atmospheres. We present high-quality Hubble Space Telescope/Wide Field Camera 3/G141 phase-resolved spectra of the white dwarf–brown dwarf binary GD 1400 ...
Rachael C. Amaro, Dániel Apai, Yifan Zhou, Joshua D. Lothringer, Sarah L. Casewell, Xianyu Tan, Ben W. P. Lew, Travis Barman, Mark S. Marley, L. C. Mayorga, Vivien Parmentier   +10 more
doaj   +1 more source

Atmospheres of brown dwarfs

The Astronomy and Astrophysics Review, 2014
Review accepted for publication by The A&A Review (Spinger), 13 Figures, 53 pages, 233 references (Figure 1 updated and typos corrected)
Helling, Christiane, Casewell, Sarah
openaire   +4 more sources

Brown Dwarf Companions to White Dwarfs [PDF]

AIP Conference Proceedings, 2011
Brown dwarf companions to white dwarfs are rare, but recent infra-red surveys are slowly reveal- ing examples. We present new observations of the post-common envelope binary WD0137-349, which reveals the effects of irradiation on the ~ 0.05M* secondary, and new observations of GD 1400 which show that it too is a close, post-comon envelope system.
Matt R. Burleigh, Paul R. Steele, Paul D. Dobbie, Jay Farihi, Ralf Napiwotzki, Pierre F. L. Maxted, Martin A. Barstow, Richard F. Jameson, Sarah L. Casewell, Boris T. Gaensicke, Tom R. Marsh, Sonja Schuh, Horst Drechsel, Ulrich Heber   +13 more
openaire   +2 more sources

Genome‐Wide Association Analyses Reveal the Genetic Basis of EMS Mutagenesis Efficiency in Rice

Advanced Science, EarlyView.
Based on large‐scale screening of 420 rice accessions, GWAS identified the Rc locus as a key regulator of EMS mutagenesis efficiency. Functional Rc alleles enhance both seed survival and genome‐wide mutation frequency by boosting antioxidant enzyme activities (CAT, SOD, POD) and reducing oxidative damage.
Peizhou Xu, Qinglu Zhang, Le Xue, Zhen Zhang, Nanhui Luo, Zhaoyang Cheng, Duo Xia, Shuqin Zheng, Xianjun Wu, Hao Zhou   +9 more
wiley   +1 more source

The Formation of Brown Dwarfs as Ejected Stellar Embryos [PDF]

, 2001
We conjecture that brown dwarfs are substellar objects because they have been ejected from small newborn multiple systems which have decayed in dynamical interactions.
Armitage P. J., Armitage P. J., Bo Reipurth, Boffin H. M. J., Bonnell I. A., Burkert A., Cameron A., Cathie Clarke, Clarke C. J., Clarke C. J., Comeron F., de la Fuente Marcos R., Goldman B., Halbwachs J. L., Hall S. M., Herbig G. H., Kohler R., Kroupa P., Larson R. B., Larson R. B., McDonald J. M., McDonald J. M., Pringle J. E., Reipurth B., Smith K. W., Sterzik M. F., Sterzik M. F., van Albada T. S., Watkins S. J., Watkins S. J.   +29 more
core   +2 more sources

Atmospheric Abundances and Bulk Properties of the Binary Brown Dwarf Gliese 229Bab from JWST/MIRI Spectroscopy

The Astrophysical Journal Letters
We present JWST/Mid Infrared Instrument (MIRI) low-resolution spectroscopy (4.75–14 μ m) of the first known substellar companion, Gliese 229Bab, which was recently resolved into a tight binary brown dwarf.
Jerry W. Xuan, Marshall D. Perrin, Dimitri Mawet, Heather A. Knutson, Sagnick Mukherjee, Yapeng Zhang, Kielan K. W. Hoch, Jason J. Wang, Julie Inglis, Nicole L. Wallack, Jean-Baptiste Ruffio   +10 more
doaj   +1 more source